On cold days my Mini S stumbles like it is flooded and does not like to run smooth. Sometimes it clears by giving it some gas with the shifter in neutral. Other times this happens even after driving a number of miles. This car is driven in Minnesota and this usually happens when the temps are close to or below O degrees F. The car has been taken to a dealer however they do not appear to have a fix for this condition. They reported ice after the butterfly in the throttle body.
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When engines are cold, it is usually normal for them to run a little bit rough due to the EGR valve and the timing of the engine with the manifold and components being cold. It takes time to vaporize the fuel to achieve full combustion. The automatic throttle should activate and put the engine at an RPM approximately 1500 to 1800. At this RPM, you should not run the car otherwise you risk losing your transmission in the long run. It may be also wise to tune up your car by checking the spark plugs, the contact points and the timing mechanism. An erratic timing mechanism can give you a rough idle.
Need year/make/model/mileage of vehicle to provide a more specific set of troubleshooting steps.
When was the last tune up? Hard starts when cold are usually caused by fouled spark plugs, worn plug wires, or weak ignition coils. Fuel systems are not as effected by temperature changes as the ignition components.
The computer should reset itself after 100miles so that all of the systems recalibrate themselves to work properly after the battery is disconnected. If the engine was flooded it will start rough and may day when close to idle until it has completely burned off all of the flooded fuel. If there was any other fluid that reached into the engine ie.. water starter fluid which you SHOULD NOT use on a rotary engine and if you feel you must pease only use a very small amount one or two sprays, the car will run rough until whatever it is burns out. By 200miles you should be running smooth again.Iif there are any warning lights remaining on you will need to troubleshoot those and go from there.
It's like faulty air flow meter, first start engine is the engine running rough disconnect electric socket from air flow meter is the engine running better than before replace air flow meter. if not need to be diagnose to find the fault code is this information helped you?
sounds like your egr valve is gummed up or bad. this is located behind the throttle body and has a single vaccum tube connected to it. if the diafram is still good you can remove it and clean it with WD 40 until the plunger works smooth
It sounds like you may have picked up some small debris from the bottom of the gas tank when you ran it empty. You may need to run a fuel/injector cleaning solution through the next tank of gas to clear the debris and consider changing your fuel filter too. Sea Foam is a great fuel additive and I recomment trying it full strength. Hope this helps!
check for coolant in the oil, or oil in the coolant. smoke is comming from somewhere, most likely burning coolant from blown head gasket. or rings are smoked and burning oil :( gunk on egr is probably burnt coolant. sorry for the bad news :(
Get the fuel injectors checked, the rubber seal may be eroded from sitting. When the seals are dry, it will run rough until the gasoline soaks them which causes them to expand. Although you may not see an error message on the dash, the computer itself may signal a problem in particular. It may be an Oxygen or MAF Sensor too.